Wall Street is giving King Digital, the company behind the popular mobile game ‘‘Candy Crush Saga,’’ the cold shoulder in its public trading debut.

King’s stock priced at $22.50 on Tuesday, valuing the company at $7.1 billion. But it opened on Wednesday at $20.50, down almost 9 percent. Its shares lost more ground by the day’s close, falling more than 15 percent.

King Digital Entertainment PLC had $1.88 billion in revenue last year. That’s more than 10 times its 2012 revenue of $164.4 million.

But some analysts have questioned whether King would be able to repeat the success of ‘‘Candy Crush,’’ which has been far more successful than any of its other games. Its other top games include ‘‘Pet Rescue Saga’’ and ‘‘Farm Heroes Saga.’’